The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Jul. 21, 2000
Jeffrey G. Dumas, West Warwick, RI (US);
Semiconductor Components Industries LLC, Phoenix, AZ (US);
Abstract
A sharp transition is achieved between pushing and pulling an output current by simultaneously diverting the bias current from a series stacked transistor circuit and from the base of a sink transistor. After the series stacked transistor circuit is kept from conducting output current, the sink transistor allows bias current to drive the other transistor circuit in the stack. Each of the transistor circuits in the stack is associated with a bias current and a sink transistor. The sink transistors and the bottom transistor circuit in the stack have emitters coupled to a floating ground. A switching signal input circuit includes an input transistor and a current mirror. The low input signal from the switching signal input circuit to a control input at a first sink transistor in the drive circuit is clamped relative to the floating ground.